Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.46 — Work as worship
यतः प्रवृत्तिर्भूतानां येन सर्वमिदं ततम्। स्वकर्मणा तमभ्यर्च्य सिद्धिं विन्दति मानवः ॥
yataḥ pravṛttirbhūtānāṃ yena sarvamidaṃ tatam | svakarmaṇā tamabhyarcya siddhiṃ vindati mānavaḥ ||
Meaning
By worshipping, through one's own work, the One from whom all beings come and who fills this whole world, a person attains perfection.